How does a pressure gauge work?
Jul 25,2025
A pressure gauge is an instrument used to measure the pressure of fluids (gases or liquids). Its working principle is based on the deformation of elastic elements under pressure, which is then converted into a readable pressure value through mechanical or electronic means. Different types of pressure gauges have different core structures, but their basic principles are similar. The following is a detailed explanation of the working mechanisms of common types:
I. Core Principle: Elastic Deformation and Force Transmission
The core of all pressure gauges is the elastic sensing element (such as Bourdon tubes, diaphragms, bellows, etc.). When the pressure of the measured fluid acts on the elastic element, the element undergoes deformation (such as bending, stretching, flattening, etc.), and the degree of deformation is proportional to the pressure. Through mechanical transmission mechanisms (such as gears, levers) or electronic sensors, the deformation is amplified and converted into pointer rotation or electrical signals, and finally the pressure value is displayed.
II. Working Methods of Common Types
III. Key Concept: Reference Datum of Pressure
NEXT:
Add: 168 Lingyun Road, Liushi Town, Wenzhou City, Zhejiang Province, China
Tel/WhatsApp: +86-18066331533
E-mail: robert@shengdiyb.com
Fax: 0577-27861919
ZhenHua Packing Machinery
FOLLOW US
ENQUIRY NOW
*Note: Please be sure to fill in the information accurately and keep the communication open, we will get in touch with you as soon as possible